[Gmsh] Question about mesh refinement with stating of characteristic lengths

[Moritz Nadler]

Thanks for you fast reply but do not get what I have to do.

I tried to make a dummy surface out of the dummy point but I failed
I would be great if somebody could give me an example of a dummy geometry for 
changing the local mesh refinement so I can understand how I have to do it.

kind regards


Moritz


//my current .geo file with a non working dummy geometry
highPr = 0.000015;
midPr = 0.0002;
lowPr = 0.0006;
vLowPr = 0.001;

Point(1) = {0,0,0,highPr};
Point(2) = {0.25E-2,0,0,midPr};
Point(3) = {0.5E-2,0,0,highPr};
Point(4) = {0.5E-2,0.025E-2,0,highPr};
Point(5) = {0.75E-2,0.025E-2,0,midPr};
Point(6) = {2.25E-2,0.025E-2,0,midPr};
Point(7) = {2.5E-2,0.025E-2,0,highPr};
Point(8) = {2.5E-2,0,0,highPr};
Point(9) = {2.75E-2,0,0,midPr};
Point(10) = {4E-2,0,0,lowPr};
Point(11) = {9.5E-2,0,0,vLowPr};
Point(13) = {0,9.525E-2,0,vLowPr};
Point(14) = {0,4.025E-2,0,lowPr};
Point(15) = {0,2.775E-2,0,midPr};
Point(16) = {0,2.525E-2,0,highPr};
Point(17) = {0,2.275E-2,0,midPr};
Point(18) = {0,0.775E-2,0,midPr};
Point(19) = {0,0.525E-2,0,highPr};
Point(20) = {0,0.275E-2,0,midPr};
Point(21) = {0,0.025E-2,0,highPr};

// dummy gemetrey to lower the mesh density in this area (does not work)
Point(100) = {0.25E-2,0.275E-2,0,midPr};
Line(100) = {100,100};
Line Loop(101) = {100, 100};
Plane Surface(102) = {101};

Line(1) = {1,2};
Line(2) = {2,3};
Line(3) = {3,4};
Line(4) = {4,5};
Line(5) = {5,6};
Line(6) = {6,7};
Line(7) = {7,8};
Line(8) = {8,9};
Line(9) = {9,10};
Line(10) = {10,11};
//Line(11) = {11,12};
//Line(12) = {12,13};
Circle(11) = {11,1,13};
Line(13) = {13,14};
Line(14) = {14,15};
Line(15) = {15,16};
Line(16) = {16,17};
Line(17) = {17,18};
Line(18) = {18,19};
Line(19) = {19,20};
Line(20) = {20,21};
Line(21) = {21,1};

Line Loop(22) = {1,2,3,4,5,6,7,8,9,10,11,13,14,15,16,17,18,19,20,21};
Plane Surface(23) = {22};

//end file


avid Colignon schrieb:
> Hi,
> 
> it doesn't work because a dummy point is not enough, the dummy point 
> must be part of a dummy line, which must be part of a dummy surface.
> 
> Or you can have a look at:
> 
> http://www.geuz.org/pipermail/gmsh/2008/003141.html
> 
> Cheers,
> 
> Dave
>